Dielectric properties of sulfonated poly(ether ether ketone) (SPEEK) electrolytes with 1-ethyl-3-methylimidazolium tetrafluoroborate salt: Ionic liquid-based conduction pathways
     
Yazarlar (5)
Doç. Dr. Mesut YILMAZOĞLU Yalova Üniversitesi, Türkiye
Prof. Dr. Hamit ERDEMİ Yalova Üniversitesi, Türkiye
Fatih Bayıroğlu Yalova Üniversitesi, Türkiye
Ufuk Abacı Kocaeli Üniversitesi, Türkiye
H Yuksel Guney Kocaeli Üniversitesi, Türkiye
Makale Türü Özgün Makale (SSCI, AHCI, SCI, SCI-Exp dergilerinde yayınlanan tam makale)
Dergi Adı Colloids and Surfaces A Physicochemical and Engineering Aspects (Q1)
Dergi ISSN 0927-7757 Wos Dergi Scopus Dergi
Dergi Tarandığı Indeksler SCI-Expanded
Makale Dili İngilizce Basım Tarihi 02-2021
Cilt / Sayı / Sayfa 611 / 1 / 125825–0 DOI 10.1016/j.colsurfa.2020.125825
Makale Linki https://doi.org/10.1016/j.colsurfa.2020.125825
Özet
In this study, dielectric properties of sulfonated poly(ether ether ketone) (SPEEK) solid polymer electrolytes (SPEs) containing room-temperature molten salt, 1-ethyl-3-methylimidazolium tetrafluoroborate were investigated. Additionally, the effects of ionic liquid (IL) addition on the thermomechanical properties and the micro-structure of composite electrolytes (SPEEK-30 × 1IM and SPEEK-30 × 2IM) were studied. The characteristics of the SPEs were investigated by FTIR, SEM, TGA, DSC and DMA measurements. FTIR analysis confirmed the success of the sulfonation process and IL/sulfonated polymer interactions. IL addition caused changes in the crystalline structure and surface morphology of the SPEs. It was observed that SPEEK-30 × 1IM and SPEEK-30 × 2IM electrolytes have lower glass transition temperatures (Tg) and crystallinity than that of pure SPEEK-30. Due to the amorphous character formed by IL, proton conduction paths in which ILs exhibit enhanced conductivity have been formed. Among the composite electrolytes, SPEEK-30 × 2IM demonstrated an ionic conductivity (5.45 × 10−4 Scm-1) more than 20 times higher than SPEEK-30.
Anahtar Kelimeler
Dielectric properties | Solid polymer electrolyte | Sulfonated poly (ether ketone) | Ionic liquid | Ionic conductivity